Exchange of salt and moisture in the underground water management

Abstract

Abstract Water – as moisture, has an essential role in all biochemical processes of plants, all vital processes, occurring in a vegetative organism, can proceed normally only under the condition of sufficient saturation of cages by moisture. Results of theoretical researches on dynamics of ground humidity have shown: (1) similarity of physical processes of change of humidity of soil on different irrigated areas. (2) hysteresis of the nature of humidity at irrigation and drainage. (3) the sharp recession of humidity of soil in the root zone. The developed models (33) - (34) can be used in the calculation of moisture and salt transfer both in the initial period of plant development and in the calculation of washing of saline lands. The use of models and the coefficients of the mathematical model to determine the parameters of moisture and salt transfer make it possible to calculate the reserve of soil moisture and optimize the sowing time at its maximum value.